Radar
device · 1935 · Electric age
Detecting objects by reflected radio waves.
Inventor: Christian Hülsmeyer.
What it is made of
- Magnetron — has part. The cavity magnetron made compact radar possible.
- Antenna — has part. An antenna emits and receives.
Principles and materials it uses
- Electromagnetic waves — uses. Radio waves reflect off the target.
- Copper — is made of. The waveguides are copper.
Where it is used
- Jet airliner — is part of. A weather radar.
- Jet fighter — is part of. A radar.
- Airport — is used in. Radars.
- Air traffic control — is used in. Radiolocation.
- Anti-aircraft gun — is used in. Radar guidance.
History: what it evolved from and what it influenced
- Microwave oven — inspired. Spencer noticed the heating while working with radar magnetrons.
What it is a kind of
- Doppler radar — includes. A radar.
Things built in a similar way
- Sonar — works like. The same echolocation principle: sound in water instead of radio waves.
- Parking sensor — works like. A parking sensor, like radar, catches a reflected signal — only ultrasonic.